Method for depositing metal tantalum coating on stainless steel

• Main Authors: LENG YAN, PAN TAIJUN, GU YUKAI
• Format: Patent
• Language: Chinese; English
• Published: 02.08.2022
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention belongs to the field of preparation of metal coatings, and particularly relates to a method for depositing a metal tantalum coating on stainless steel, which comprises the following steps of: surfacing an electrode (tantalum) on a workpiece substrate (stainless steel) by using a charge-discharge principle of a pulse circuit, generating electric sparks between a workpiece and the electrode by high current at the moment that the pulse width is 50-100 microseconds, and depositing the metal tantalum coating on the workpiece substrate (stainless steel). The tantalum electrode is melted to be deposited on the workpiece base body, so that the tantalum electrode is tightly combined with the workpiece base body at high strength; by means of the process, metallurgical bonding of the coating and the base body is achieved, thermal deformation of the workpiece is prevented, the process is used for surface coating, the corrosion resistance of the surface of the workpiece can be improved, the problem that the